Repetitive Babbles of Babies are Motivated by Their Ability to Hear Themselves

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Hearing loss in children affects the child's development. It causes delay in the development of speech and language. A new study has revealed that the repetitive babbles of babies primarily are motivated by the infants' ability to hear themselves.

Repetitive Babbles of Babies are Motivated by Their Ability to Hear Themselves

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Study author Mary Fagan, an assistant professor of communication science and disorders in the University of Missouri-Columbia School of Health Professions, said, "Hearing is a critical aspect of infants' motivation to make early sounds. The fact that they attend to and learn from their own behaviors, especially in speech, highlights how infants' own experiences help their language, social and cognitive development."

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Fagan said, "This research does not diminish the importance of the speech that babies hear from others. We know they need to learn from others, but it raises our awareness that infants are not just passive recipients of what others say to them. They are actively engaged in their own developmental process."

For the study, researchers studied the babbles of 27 hearing infants and 16 infants with profound hearing loss before and after they received cochlear implants. Cochlear implants are small electronic devices embedded into the bone behind the ear that replace some functions of the damaged inner ear. Before receiving cochlear implants, babies with profound hearing loss rarely produced repetitive vocalizations, such as 'ba-ba' or 'da-da.'

Fagan said, "Within a few months of receiving cochlear implants, the number of babies who produced repetitive vocalizations increased, the number of vocalizations that contained repetitive syllables increased, and the number of actual repetitions in the string, such as 'ba-ba-ba-ba-ba,' increased. The research tells us that infants are motivated by hearing the sounds they produce, so these sounds are functional in some way."

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